At the core of all well-founded belief lies belief that is unfounded.
If you tried to doubt everything you would not get as far as doubting anything. The game of doubting itself presupposes certainty.
476. Children do not learn that books exist, that armchairs exist, etc.,etc. - they learn to fetch books, sit in armchairs, etc.,etc. Later, questions about the existence of things do of course arise, "Is there such a thing as a unicorn?" and so on. ...
Where two principles really do meet which cannot be reconciled with one another, then each man declares the other a fool and a heretic
I act with complete certainty. But this certainty is my own.
I am sitting with a philosopher in the garden; he says again and again 'I know that that’s a tree', pointing to a tree that is near us. Someone else arrives and hears this, and I tell him: 'This fellow isn’t insane. We are only doing philosophy.
